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Topic: GMRT

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Radio telescope

Parabolic reflector

VLA

	Giant Metrewave Radio Telescope - Wikipedia, the free encyclopedia
		It is operated by the National Centre for Radio Astrophysics, a part of the Tata Institute of Fundamental Research, Bombay.
		The GMRT is located around 80 km north of Pune at Khodad.
		The GMRT is an interferometer which uses a technique known as aperture synthesis to make images of radio sources.
	en.wikipedia.org /wiki/GMRT (369 words)

	Giant Meterwave Radio Telescope (GMRT)
		The GMRT, located near Pune in India, is the youngest of the current large interferometers.
		Another strength of the GMRT is its location quite close to the equator, due to which is can observe both the northern and the southern sky, missing only quite small areas in the polar regions.
		Operating at low radio frequencies, the GMRT's major strengths lie in observations of nonthermal radio continuum emission and of the HI line of neutral Hydrogen.
	www.atnf.csiro.au /people/mdahlem/obs/radio/gmrt.html (177 words)

	telescope
		The dishes are configured such that 12 of them are located in a compact central array in a 1 km x 1 km region and the other 18 are placed along the three 14 km long arms of an approximate ‘Y’ configuration providing a maximum baseline of about 25 kms.
		The GMRT will be a versatile instrument for investigating a variety of radio astrophysical problems concerning the sun, radio stars, pulsars, H(II) regions, supernova remnants, the Galactic centre, nearby galaxies, radio galaxies, quasars and cosmology.
		However, two of the important scientific objectives of the GMRT is to search for neutral hydrogen clouds prior to the formation of galaxies and clusters in the universe and to search for and study rapidly-rotating Pulsars in our galaxy.
	members.tripod.com /ieeepubs/story8.htm (630 words)

	Photos of GMRT (Site not responding. Last check: 2007-10-25)
		The Giant Metrewave Radio Telescope (GMRT) is the world's largest radio telescope in its frequency: 30 parabolas of 45m diameter each, spread on a disc of 25km diameter.
		Because they measure meterwaves, the waves will reflect on the surface of the dish as if it was continuous even if it is actually only a grid, with fine enough gaps (a few centimeters): this was used to build very light parabolas.
		On 8, Susmit and I are standing in the middle of the telescope.
	www.tcs.tifr.res.in /~jgmorard/photos/pune/gmrt (155 words)

	Kapteyn Astronomical Institute - Colloquia
		The GMRT operates at present in 5 different frequency bands: (i) ~ 120-160 MHz, (ii) 220-260 MHz, (iii) ~ 310-350 MHz, (iv) ~590-630 MHz and (v) ~1000-1230 MHz.
		The GMRT correlator system produces 128 frequency channels in two bands, each varying from 64 kHz to 16 MHz.
		It is proposed to upgrade the performance of the GMRT considerably by (i) more or less continuous frequency coverage from ~ 40 MHz to 1430 MHz by using three groups of wide band feeds, (ii) lowering the system temperature using newly available devices and (iii) a 256 MHz correlator.
	www.astro.rug.nl /~kc/nextcolloquium.html (178 words)

	Observations of Supernova Remnants
		Secondly, GMRT has only recently come to a stage where enough antennas are available in the interferometric mode to attempt imaging of weak extended sources, which truly tests the imaging performance of the instrument.
		Although morphologically this central emission appears to be emission from the edges of the 'barrel' seen in projection, it is important to measure the spectral index of this emission to evaluate the possibility of this being a filled-center SNR.
		Note that the south-east protrusion seen in the GMRT image coincides with faint emission in the form of a smaller arc at the same location in the NVSS map, suggesting either the presence of another faint SNR in the field or a bi-annular morphology.
	www.aoc.nrao.edu /~sbhatnag/Thesis/html/node11.html (6888 words)

	[No title] (Site not responding. Last check: 2007-10-25)
		GMRT currently operates in the frequency bands 151, 235, 327, 610 and 1000-1400 MHz.
		GMRT consists of 30 fully steerable parabolic dishes, each of 45 m.
		GMRT is thus a very sensitive aperture synthesis array at low frequencies.
	www.tifr.res.in /~multi/abs/anantha.txt (240 words)

	Scientists to fix gaze on universe
		Enthused by the success gained in discovering a galactic Supernova in the middle of our galaxy, scientists at GMRT plan to concentrate on observing clusters of galaxies, finding neutral hydrogen clouds, studying remnants of Supernovas and observing pulsars across the spectrum for a better understanding of the universe.
		Prof Govind Swarup, head of the Rs 50 crore project who was speaking to reporters during a visit to Narayangaon during the international symposium on ``The Universe at Low Radio Frequencies'' called it a quest to understand the origin of the universe and also an attempt to study the formation of new galaxies.
		GMRT will throw its doors open to the world's scientific community to conduct studies.
	www.expressindia.com /ie/daily/19991203/ige03155.html (464 words)

	S.Bhatnagar: GMRT Offline Software
		GMRT native data recording format is referred to as the Long Term Accumulation format (The LTA Format).
		Functions in this library operate on the GMRT LTAfile for editing (flagging or unflagging) the bad data in each record (times- tamp) corresponding to the bad antennas, bad baselines and bad channels.
		The GMRT Off-line data analysis package is built to operate on the GMRT native LTA file formats.
	www.aoc.nrao.edu /~sbhatnag/GMRT_Offline/offline.html (1064 words)

	ANNEXURE
		Keeping in mind the commissioning of the GMRT and the Hanle Telescope, (late) Vijay Kapahi and CRS decided to defer the follow-up of these 100 sources until the Indian facilities came into operation.
		We have presently identified the GMRT observations of these 100 radio sources for the Ph.D. thesis of Nadeem Oozeer from the University of Mauritius as a part of the ongoing collaboration between the University of Mauritius and RRI.
		It is planned to observe all the sources (about 100) using the GMRT at several frequencies to obtain spectra and detailed maps.
	icarus.uom.ac.mu /nadeem/node27.html (625 words)

	talk070502
		N, long: 74 deg 3 min E) (GMRT) is a national and international facility in radio astronomy that has been set up by TIFR scientists and engineers in the fore-front of astronomy.
		GMRT currently operates in 8 different frequency bands in the range 100 to 1700 MHz.
		From Janaury 1, 2002, the facility is open for scientific use by astronomers, on the basis of submitting proposals to the GMRT Time Allocation Committee (GTAC).
	www.tifr.res.in /~aset/year2002/talk070502.htm (187 words)

	Observing at the GMRT \| Astronomy Blog
		The GMRT (run by the National Centre for Radio Astrophysics, or NCRA) consists of thirty antennas arranged in a Y-shaped configuration near the village of Khodad, India.
		We are observing the first half of a sample of nearby Seyfert galaxies, looking for absorption caused by clouds of neutral hydrogen gas in front of the core of the galaxy.
		Most of the GMRT astronomers are based on the University campus in Pune, two hours drive south of the telescope, and spend a few days a month at the telescope making observations or helping visitors with theirs.
	www.strudel.org.uk /blog/astro/000166.shtml (989 words)

	Daily Excelsior...Business
		GMRT is one of the world’s most powerful and versatile radio telescopes and is equipped with state-of-the-art electronics.
		Apart from it, the GMRT would also be exploited to study other astrophysical phenomenon such as distant quasars, radio galaxies, clusters of galaxies, pulsars, remnants of supernovae and the solar system, Swarup, who was the project director of GMRT from 1987 to 1996, said.
		To mark the operationalisation of GMRT, NCRA is organising an international seminar on the universe at low radio frequencies which is being attended by about 200 astronomers across the globe.
	www.dailyexcelsior.com /99dec02/busi.htm (1798 words)

	What's On
		Since GMRT provides angular resolution at the few seconds of arc level at decimetre wavelengths, it is being used for a variety of astrophysical studies.
		The facility is open for scientific use by astronomers from all parts of the world, on the basis of submitting proposals to the Gmrt Time Allocation Committee (GTAC).
		Construction of GMRT in India has been an exciting venture for a large team of engineers and scientists.
	www.atnf.csiro.au /whats_on/?action=showcolloquia&event_id=1308 (292 words)

	Industrial Visit
		The agenda for the day, included visiting the various 43m wide radio telescope antennas at the GMRT, besides seeing the actual data that was recorded from the observations.
		The GMRT is located at a place called Narayangaon, about 80 Kms.
		This was followed by a small recorded talk on pulsars and their observations using the GMRT.
	members.tripod.com /ieee-vesit/industri.htm (2228 words)

	[No title] (Site not responding. Last check: 2007-10-25)
		In the specific instance of the GMRT, the restricted access to the 1610.6 to 1613.8 MHz band is a double misfortune.
		The GMRT is acclaimed in the scientific world for its low-cost parabolic dish.
		Although the GMRT was originally designed to operate in six different frequency bands between 38 MHz and 1420 MHz, the flexibility of this design allowed scientists to extend its operations to the higher frequency bands of 1610.6 to 1613.8 MHz.
	www.flonnet.com /fl1522/15220940.htm (1605 words)

	tata.com : Radio astronomy in India
		And the best way of marking the occasion would be to try and do something very close to his heart.
		In the shadow of his brainchild, the Giant Meterwave Radio Telescope (GMRT), NCRA held a two day meet on March 22 and 23 to felicitate Prof.
		TCE Consulting Engineers Limited is proud to be associated with projects of radio astronomy in India namely Ooty Radio Telescope, Solar Concentrator, Giant Equatorial Radio Telescope and GMRT.
	www.tata.com /tce_cons_engg/releases/20040323.htm (202 words)

	Validity of specifically applied rare earth elements and compartmental models for estimating flux of undigested plant ...
		GMRT by CMM and IEPD are common except for the indelibility
		PIF is a critical one in that the responses in GMRT reflect
		We propose that the proportions of GMRT due to mixing flow in
	jas.fass.org /cgi/content/full/80/10/2753 (3601 words)

	Extrasolar Planets Posters - Planetary Sciences [P]
		Currently, the GMRT is the most sensitive radio telescope for extrasolar planet studies.
		We have obtained data from GMRT in this mode and the results of preliminary analysis is described in another paper at this meeting.
		At the operating RF of 150 MHz, we have determined that the GMRT has a fantastic sensitivity of 2 mJy over a bandwidth of 5 MHz and a timescale of one hour and is relatively free of RFI between midnight and early morning hours local time.
	www.agu.org /meetings/sm05/sm05-sessions/sm05_P21E.html (1229 words)

	Riverside Publishing - Gates-MacGinitie Reading Tests Details
		The basic premise of the Gates-MacGinitie Reading Tests, both paper-pencil and online, is that it is useful for teachers and schools to know the general level of reading achievement of individual students throughout their entire school careers.
		A special research study was conducted in November and December 2000 to statistically link GMRT Comprehension test scores to the Lexile Framework’.
		Scores on the GMRT Comprehension test can be linked to Lexile measures because of the research described in the new Lexile Conversions Manual, available fall 2006.
	www.riverpub.com /products/gmrt/details.html (1187 words)

	Division X/Commission 40: Radio Astronomy
		New 5 and 11 cm receivers as well as 7 beam Ka and L band arrays are being build for the Effelsberg 100-m telescope.
		The GMRT is located near Pune, India, and is operated by the National Centre for Radio Astrophysics (NCRA-TIFR).
		The GMRT telescope is already operating at 5 frequencies, 150, 233, 327, 610, and 1420 MHz.
	www.astrosmo.unam.mx /IAU_Com40/2003/Div_X_rep.html (5957 words)

	Glossop Mountain Rescue Team - join
		If a period of more than 12 months is required off the call out list the individual will revert to a probationary member, or if deemed necessary by the team leader a prospective member.
		All team members must continue to satisfy the current GMRT commitment requirements for attendance at call outs, exercises, team training and other GMRT events for their level of membership.
		The committee will review each members' commitment at six monthly intervals and where necessary, recommend to the team that an individual's membership be revoked due to lack of commitment, or on any other grounds deemed appropriate by the committee.
	www.gmrt.org.uk /join.php (726 words)

	Assessment of the Reading Department (Site not responding. Last check: 2007-10-25)
		Those numbers were in line with previous results using the GMRT.
		Pre/Post Test: We continued to use three levels of the GMRT to pre/post all three levels of reading classes.
		We can use regular scantron answer sheets, which are considerably less expensive than the special GMRT answer sheets and over the long run will reduce assessment costs in our department.
	www.southsuburbancollege.edu /aoa/reading.html (1715 words)

	Supercomputing Online - Homepage for the World’s High-performance Computing, Networking & Storage Professionals
		The powerful Giant Metrewave Radio Telescope (GMRT) located in India on the hills of Narayangaon on the Pune-Nashik highway has spotted its first pulsar—a rare spinning star that is heavier than the sun.
		Spread over 20 km near Khodad village in rural Pune with 30 giant parabolic antennae— each about 45 m in diameter or the size of a small swimming pool, this one is the world’s most powerful radio telescope in metre wavelength.
		Twenty per cent of GMRT’s observation time goes into the study of pulsars, and one-third of this time is used by foreign observers, who apply for sanction every six months to GMRT’s time allocation committee.
	www.supercomputingonline.com /article.php?sid=5621 (416 words)

	[No title] (Site not responding. Last check: 2007-10-25)
		GRB050401: Radio observation at 610 MHz with GMRT Poonam Chandra and Alak Ray (Tata Institute of Fundamental Research (TIFR), Mumbai) report the observation of GRB 050401 with the Giant Metrewave Radio Telescope (GMRT) on 2005 April 2.77 (UT) at 617 MHz frequency with a bandwidth of 32 MHz.
		The map rms is 0.23 mJy and 2-Sigma upper limit to the GRB flux density is 0.46 mJy.
		We thank the GMRT staff, in particular the National Centre for Radio Astrophysics (NCRA) Director Dr. Rajaram Nityananda for making the observations possible, and Dr. Paolo Freire, Yashwant Gupta and collaborators for allowing a part of their time to be used for this observation.
	gcn.gsfc.nasa.gov /gcn3/3178.gcn3 (177 words)

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